Bracket for electric lamps



(NoMoaeL) Y H. BDMUNDS, Jr.

" BRACKET POR VEL'BG|.RIG LAMPS.

110.291.171. Patented Jan'. 1,1884.4

6 ggf f. -Y t1h\uii*EnFl STATES PATENT EErcE.

Hmv'nv EDMU'NDS, Jn., OE NEWl YORK, N. Y., AssrGNOE To THOMAS J. MONTGOMEEY, OE BOSTON, MASSACHUSETTS.

"s RAjc KETfFoR' ELECTRIC LAM Ps.

' SPECIFICATION 'forming part or Letters Patent No. 291,171, dated January `1, 1894.

' l Applcaionlerl April ,1853.v (No model.)

Beitknownthat'l, HENRY EDMUNDS, Jr., of the city and State of N ew York, have invented an Improvement in Brackets for Electric Lamps, of which the following is aspeciiication.

'lhe object of this invention is to 'exclude the'conductors from' sight and to allow the arms of the brackets to be revolved orturned more or less without injury to the Aconductors and without breaking the metallic circuits.

In the drawings, Figure lis an elevation pf the bracket and electric lamp, with the wallplate in section. Fig. 2 is a Section of the lamp-base. Fig. 3 is a section of the joint at the base of the bracket-arm. Fig. 4 is a section of the switch. Fig. 5 is a face view of the wall-plate. Fig. 6 is a plan of the switchratchet. Fig. 7 is an inverted plan of the ratchet contact-pins. Fig. 8 is a perspective view of the switch-ratchet, and Fig. 9 is a plan of the joint contacts.

The electric lamp A is of Vany desired character, and at A', I have shown a shade. The bracket may be provided with two Y or more joints in the arms. I have shown one joint at G5 between the arm D and the stationary portion of the fixture; and I have described hereinafter the construction of such joint, and remark that each joint on the arms of the bracket will be made in the same manner.

. At c2, Ihave represented the end of an ordinary gas fixture. Upon this the wall-plate H is fastened. Said wall-plate, however, may be screwed to the wall when there is not any gaspipe. The conductors b. b pass along the grooved slips e to the wall-plate H', where they are fastened to binding-plates o and screws 7, and at tthere is a circuit-fuse or safety-'switch that melts and breaks the circuit when there is too much current 'in the line or branch circuit. The wires b b pass from the plates t to the rings b b4, respectively. These are fastened concentrieally to the hub of the wallplate H', and upon this hub the secondary wall plate or base K is screwed. The parts through which the wires pass are Vmade of insulating material, and within the recessed back of K there are insulated rings o 0*, secured similarly to the rings b3 b4, so that when the base K is screwed upon the hub of the l material.

wall-plate the bracket will be in position for use.V AThe conductors b b pass off from the respective rings c and 0', through the switch H and joint o5, to the base of the burner, and to the filament in the incandescent lamp.

The base B ofthe burner is of insulating Ihe upper part, l, slips Yover the lower part, Z', and these two parts are conv nected by the pins o o', passing into holes above and below the point of junction. The, conductors from the spring-hooks el for the lamp pass through separate holes in the part Z, and their ends are brought out and passed into'the holes for the respective pins o o', and the naked ends of the covered conductors bb are passed into the holes for the respective pins before these metal. pins are driven in; lhence the conductors and pins are permanently connected, and the base-piece Z is to be attached at the end of the arm D; but the part l can be lifted on or off the pins o o', and when in place the metallic contact will be completed in the circuit by the pins o o.

The joint at c5 in the fixture is made with the two hollow parts c and cof the fixture, through which passes a pivot-bolt, L', with nuts It" at the respective ends to apply the neceesary pressure and friction. Betweenthe two parts c3 and c there is the cup-piece s and the cap s to the same, the bolt 7c passing centrally througlthese, and within the cup there are two disks of insulating material, o2 and o, which are grooved concentrically,and the ends of the covered wire conductors b and b are scraped bare, passed through holes at the bot toms ofthe respective concentric grooves, and bent into a circle, or nearly so in order that they may lie in the bottoms of such grooves, as seen in Figs. 3 and 9, and into the respective grooves there are placed short helical springs di, preferably of flat sheet metal, each one having about two convolutions, so as to pressy upon the respective conductors as they lie in the bottoms of the respective grooves and form metallic contacts between the same. This construction allows for the arm of the bracket being turned entirely or partially around, and for the respective positive and negative conductors remaining perfectly connected.

My switch is intended to take the place of the plug ot' a gas-cock. Ihave shown the portion c as the barrel of said cock, into which the plug` 10 of insulating material is inserted and secured by thc screw and washer 11. rlhere is a hole through the plug for one of the circuit-wires, b, and the other circuitwire, b, is separated and passed through the plug to the contact-pins 12 13, that extend across an annular recess in the lower end of said plue. Outside the plug the case c is screwed, and within it there is a stem, 14, with a head, 15, outside the case by which the Stem can be revolved. The inner end of the stem is squared and passes through the ratchetswiteh a, which is made of vulcanitc or other insulating material. '-lhere are four teeth to this ratehetswiteh. The two teeth 1T 1S are of the vulcanitc, and the other two teeth 21, 22, are covered with a metal plate that is cupshaped in the middle and extends aeross from one tooth tothe other, as seen in Figs. 6 and 8, and there is a spring, 19, by which the ratchet-switch is pressed toward the contactpins 12 13. W'hen the vulcanite teeth are in contact with the pin, then thc current is interrupted; but when the teeth that are of metal arc in contact with the pins 12 13, the

pins indicates the completion of a movement I fortnrning the current on or oft.

I claim as my invention- 1. The wall-plate H and the circuit-councctious thereon, in combination with the contact-rings b b, the secondary wall-plate K and its conduetoisnd the xture for au electric lamp screwed upon the hub of the wallplate, substantially as set forth.

2. In combination with the bracket-arm for an electric lamp, the joint-pivot, the concentrically-grooved plates of insulatingv material, the naked ends of the conductors in such grooves, and spring-contacts in the grooves between the respective conductors,substantially as set forth.

Signed by me this 29th day of March, A. l). 1883.

HEXRY EDMVNDS, .112.

\Vitnesses:

GEO. S. PINCKNEY, Wimanr G. Morin 

